17 flashcards · Shared on 19 August 2026 by AtomAI Library
Flip each card to check yourself.
What is the oxidation number of oxygen in hydrogen peroxide, H₂O₂?
−1
What is the oxidation number of oxygen in hydrogen peroxide, H₂O₂?
−1
In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species is oxidized?
Zn
Which description best defines disproportionation?
One species is both oxidized and reduced in the same reaction
When a redox equation is balanced, what must be true about electron transfer?
The number of electrons lost equals the number gained
Reduction is best described as which process?
Gain of electrons and a decrease in oxidation number
In the permanganate ion, MnO₄⁻, what is the oxidation number of manganese?
+7
What is the oxidation number of hydrogen in the metal hydride NaH?
−1
Which half-equation correctly represents the oxidation of Fe²⁺ to Fe³⁺?
Fe²⁺ → Fe³⁺ + e⁻
What is an oxidizing agent?
A substance that accepts electrons and is reduced
What is a reducing agent?
A substance that loses electrons and causes reduction
Which rule applies to the oxidation numbers in a neutral compound?
Their sum equals zero
For the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species acts as the oxidizing agent?
Cu²⁺
Which change defines oxidation in a redox reaction?
Loss of electrons and an increase in oxidation number
What is the oxidation number of sulfur in the sulfate ion, SO₄²⁻?
+6
Fluorine has an oxidation number of −1 in OF₂. What is the oxidation number of oxygen?
+2
Which reaction is not a redox reaction?
HCl + NaOH → NaCl + H₂O
In acidic solution, how many electrons are required to reduce one MnO₄⁻ ion to Mn²⁺?
5